Rio and chinalco declined to comment .

力拓和中铝均拒绝置评。

There are other arguments against rio .

还有其它不利于里约热内卢的理由。

Rio tinto denies the charges .

力拓否认了这些指控。

Rio beat surprise finalist madrid in the last round of voting .

里约热内卢在最后一轮投票中击败意外晋级的对手马德里。

Years of hate and mistrust are thawing in some of rio 's most violent slums .

多年的愤恨和不信任已经深深植入了一些里约热内卢最暴力的贫民窟。

Chinalco is rio 's largest shareholder .

中铝是力拓的最大股东。

Rio has rejected the bhp bid .

力拓已拒绝了必和必拓的出价。

But they stress that rio faces different challenges .

但是他们感到压力很大，因为里约面临不一样的难题。

The rio olympics announcement on friday was undeniably exciting and even moving .

上周五宣布里约申奥成功的一刻无疑是激动人心甚至感人至深的。

The rio organisers have been liaising with their london counterparts since 2009 .

自2009年起，里约主办方与伦敦有关各方一直保持联系。